SU

Senior AI Backend Engineer

SumUp· 37 open roles

Location TBD On-siteFull-time56 years ago
Salaryest.
€80,000 - €140,000
Experience
Mid
Job Type
Full-time
Posted
56 years ago
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About This RoleAI processing…

Team description SumUp Edge is our most ambitious product bet right now — an AI-powered co-pilot that transforms raw merchant data into proactive, real-time business insights. We're moving from being a payments processor to becoming an intelligent operating system for small businesses, and the backend infrastructure powering that shift needs to be world-class. This role sits at the very centre of that build: you'll architect the systems that connect our data platform, LLM orchestration layer, and merchant-facing APIs — and the work you do here will directly shape how millions of small business

Key Responsibilities

  • 1
    Architect, design, develop and deploy our AI solutions and systems in production environments, ensuring reliability, high performance and scalability.
  • 2
    Design and build the orchestrator service that coordinates AI components, data flows, and external services to deliver reliable, real-time insights to merchants
  • 3
    Develop and maintain scalable ETL pipelines or MCPs that process and sync heterogeneous data (text, images, audio) from various sources into the AI system
  • 4
    Build and optimise the LLM Gateway infrastructure, including authentication, rate limiting, load balancing, and vector database management for the RAG system
  • 5
    Create robust, high-performance APIs capable of handling multimodal data structures and high-volume requests, ensuring low-latency and production-grade reliability
  • 6
    Implement observability tooling — including telemetry, logging, and tracing — to support auditing, evaluation, and continuous improvement of AI interactions
  • 7
    Mentor backend engineers on the team, contributing to engineering standards, code reviews, and a culture of technical excellence
  • 8
    Collaborate and communicate closely with data scientists, product managers, developers and other business stakeholders to bring state-of-the-art AI solutions to Customer Support, enhancing customer experience and improving operational efficiency.

Requirements

  • Bachelor's or master's degree in Computer Science, Engineering, or a related field.
  • +6 years of experience developing software products (if they are ML or AI related is a plus)
  • Advanced proficiency in Python, with hands-on experience building and scaling backend systems in production environments using tools like Kubernetes, Docker, Airflow, and Spark.
  • Strong knowledge of cloud infrastructure (AWS, S3) and CI/CD practices, with a track record of shipping reliable, maintainable systems.
  • Experience designing APIs and working with distributed data systems and message brokers such as Kafka or RabbitMQ.
  • Comfort working at the intersection of backend engineering and AI — including familiarity with LLMs, GenAI tooling, and machine learning concepts.
  • Experience with status monitoring using cloud-native tools or 3rd party (e.g. Prometheus, Cloudwatch, ...) and LLM traceability
  • Excellent communication and collaboration skills to work effectively in cross-functional teams.
  • Ability to adapt to a fast-paced, dynamic work environment and quickly learn new technologies and techniques.
  • Strong team player (m/f/d) with the ability to work with diverse groups of people in a productive and agile manner

Perks & Benefits

🌎 Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Berlin office. This involves an office-first setup
🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced
🚀 Enrolment onto our Virtual Stock Option programme: you will own a stake in SumUp's future success
📚 A dedicated annual L&D budget of €2000 for your individual development, which you can use to attend conferences and/or advancing your career through further education
💶 A corporate pension scheme where we match up to 20% of your contributions
🏖️ Generous time off: enjoy 28 days of paid leave plus public holidays and special leave days
🏋️ Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, and subsidised office lunches
🌴 Break4me: 1-month sabbatical after 3 years of service
🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team

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